There are also numerous other tools available
There are many more tools available for BizTalk you can read more
One of the main winnings to work as BizTalk administrators is all the different scenarios you may experience. this may be network related, fileshares, different adapters and system including many more interesting elements when it comes to different customers.
Not any environment is the same and almost all applications are unique, this provides you with a great opportunity to expand your knowledge across many areas and learn a lot of different things. There is also a rather huge lack of good and competent BizTalk
Administrators around the world and usually not too hard to get a job as an administrator.